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1. (WO2001029311) A METHOD FOR THE MANUFACTURE OF LAYERED PAPER OR BOARD

Pub. No.:    WO/2001/029311    International Application No.:    PCT/FI2000/000831
Publication Date: Apr 26, 2001 International Filing Date: Sep 28, 2000
IPC: D21F 1/02
D21F 1/66
D21F 11/04
Applicants: UPM-KYMMENE CORPORATION
KOHTALA, Jyrki
Inventors: KOHTALA, Jyrki
Title: A METHOD FOR THE MANUFACTURE OF LAYERED PAPER OR BOARD
Abstract:
In the method for producing layered paper or board, the paper is formed of at least two stock flows fed one above the other, the stock flows being essentially different from one another and the components of which derive from the same stock source. The fractions (A, B, C) intended for the different layers are obtained from the same stock by separating two fractions (B, D) from the stock flow (M) of the paper or board machine's short cycle in at least one separation phase (1), both of the fractions being fed into the deculator functioning as a storage chest (2) in such a way that the fractions remain essentially different from one another, and these fractions are fed as separate stock flows into the multi-layer headbox (4) to function as the different layers of the paper or board.